I would not like if there would be a hard reset of the base values you chosed for your character.
I have in mind more a system, where you can change your base values while playing.
Lets say you chosed being intelligent but not having a big strength. Now you are using ingame just heavy Armor and a strong melee weapon.
While using this, you build up a kind of changing points for actions that are opposite to your choosen values.
If you have enough of them you will be able to remove a point of intelligence and put it into strength, to go closer to your chosen playstyle.
Yes you will be not the good Mage anymore, but you will become probably a strong warrior over time.